Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3011a0715e0b00…

MALICIOUS

PDF

76.8 KB Created: 2021-03-17 01:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e53ea32780772c1dbf83e6459690982 SHA-1: 157be702f23725d86f37fdcb6223728cb50fa1d0 SHA-256: db3011a0715e0b00e23c99a82e3a878425ba5cac0084de789b614aa66c028a1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one prominent URL leading to a suspicious domain that is likely part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/wix?keyword=the+contender+study+guide+answers
    • http://reduslim-italiaufficiale.site/dead_soul_tribe_someday1vt1m.pdf
    • http://trells.space/91516450707lqcc4.pdf
    • http://vivekawiga.sportsontheweb.net/fusumav.pdf
    • http://xatasawijuli.22web.org/analisis_parametrik_dan_non_parametrik.pdf
    • http://gelchlen.fun/counter_terror_attack_game_apk_download0gvlm.pdf
    • http://nebofimanigi.sportsontheweb.net/13237818979.pdf
    • http://antonio-ita.space/hello_bello_body_washlwa3s.pdf
    • http://tepoparupomo.medianewsonline.com/76037957132.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mozedijiz/delhi_weather_report_january_2019.pdf
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_e3aaa07332934478a9c060ba3b757704.pdf?index=true
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_8a8f02b51814440b985f7120fa2b91de.pdf?index=true
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_88dac3089f3543b484c3a6d3bab03b2a.pdf?index=true
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_93e59ae5b8774bdd973ba89c1d92983d.pdf?index=true
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_d1e2672254314b95a4dac7e44af35dac.pdf?index=true
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_acaaae36a1fd40c3b981c745b9b6b52b.pdf?index=true
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_caa115d539d948cbb66c45fb11c6ab32.pdf?index=true
    • http://gumofiwulova.epizy.com/clean_bulking_meal_plan_for_skinny_guys.pdf
    • http://zawofepak.epizy.com/candidiasis_oral_2020.pdf
    • https://s3.amazonaws.com/fidobakipivogit/baretizogovilajapem.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2f.bin
6034db2257e114864566b01218280c171f588c218409b18fafbe65fc20343977		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 5312 bytes
font_01_sfnt_off0000ff4f.bin
38bc38bbb42011059d147556885f2c1aa99be01845ac881ac594cc229755fd38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 11556 bytes

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